Teos16
Civil/Environmental
- Feb 18, 2016
- 3
Greetings!
I have a problem taking the reinforcement of a bridge reinforced concrete beam into account for correlation analysis in procor/patran/nastran. If I'm correct, procor uses normal modes analysis (sol 103), which makes using of special reinforced elements (rebar?) impossible. So, I made a solid model (hex-elements were used), where the beam working reinforcement rods are solids too, but there're another rods. Some of them are vertical and resist to shear loads, another important ones are located in the slab. And it's pretty complicated to take them into account in a FE model, which is made of hex elements. To understand what I've described, I attached some pics.
One possible solution is to modify the concrete modulus of elasticity, but how? Is it correct to just calculate the proportion of the concrete and reinforcement volumes and find new modulus of elasticity from the proprtion? When I do that the modulus doesn't increase a lot and I think this way isn't right. Might be there a special coefficient for the concrete modulus of elasticity, which makes it possible to take all the reinforcement into account? Or am I going to a wrong direction?
I'm also starting to think there's another soft, which allows to perform correlation analysis without such problems.
Thanks in advance!
1-pic - FEM
3-pic - longitudinal cut
I have a problem taking the reinforcement of a bridge reinforced concrete beam into account for correlation analysis in procor/patran/nastran. If I'm correct, procor uses normal modes analysis (sol 103), which makes using of special reinforced elements (rebar?) impossible. So, I made a solid model (hex-elements were used), where the beam working reinforcement rods are solids too, but there're another rods. Some of them are vertical and resist to shear loads, another important ones are located in the slab. And it's pretty complicated to take them into account in a FE model, which is made of hex elements. To understand what I've described, I attached some pics.
One possible solution is to modify the concrete modulus of elasticity, but how? Is it correct to just calculate the proportion of the concrete and reinforcement volumes and find new modulus of elasticity from the proprtion? When I do that the modulus doesn't increase a lot and I think this way isn't right. Might be there a special coefficient for the concrete modulus of elasticity, which makes it possible to take all the reinforcement into account? Or am I going to a wrong direction?
I'm also starting to think there's another soft, which allows to perform correlation analysis without such problems.
Thanks in advance!
1-pic - FEM
http://files.engineering.com/getfile.aspx?folder=d218dfd5-b14a-4e74-9a95-4d7a8105bf92&file=1-FEM.png
2-pic - cross-section
3-pic - longitudinal cut